The first Shared-Operative Workshop LWC-ArnoLab017, held in Florence, from 21st till 30th of September, created ephemeral installations, as light urban furniture, staging points, temporary shelters, realized on site by the revisitation and assembling of recycled natural material transported by the changing Arno River’s moods. The workshop, set on the banks of the Arno River in the Renaissance Florentine context, has been focused among shared practice strategies in collaboration with the locals, looking to conserve the Riverbanks and its cultural landscape value. The students had the opportunity to fully immerse themselves in the field, inside the cradle of the Renaissance, working with locals on the topic of the cultural landscapes sustainability inside the sensitive area, currently under transition in the middle of this historical centre (UNESCO heritage), where the intrinsic reality is a hyper-dynamic landscape due to the Arno river’s flows (in the 2016 was the 50th anniversary of last tragical flooding occurred in the 1966), now at a temporary equilibrium, that gives life to ephemeral situations, changing habitats of local wildlife and the local civic uses.